Riesel primes of the form 187•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

k , b : 187 , 2 Count : 26 Nash : 1158 Max n : 2,900,000 Date : 2024-12-26 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 17, 21, 53, 253, 2173, 3313, 5197, 5333, 6929, 28017, 40429, 47877, 80617, 110513, 139673, 141201, 263093, 379649, 483153, 618293, 645401, 739321, 838101, 1461697, 2172693

History

• 2024-05-16: Reserved by NPLB K300 Drive 1 for n > 2300000
• 2022-04-10: Checked to n = 2300000, RPS Megabit Drive 2
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-08-18: Checked to n = 2200000, RPS Megabit Drive 2
• 2019-06-24: Found n = 2172693, David Metcalfe, RPS Megabit Drive 2
• 2015-06-19: Reserved by RPS Megabit Drive 2 for n > 2000000
• 2014-04-22: Checked to n = 2000000, David Metcalfe, released
• 2014-04-15: Found n = 1461697, David Metcalfe
• 2014-04-13: Reserved by David Metcalfe
• 2011-02-01: Checked to n = 1400000, RPS Drive 6, released
• 2008-09-27: Found n = 838101, Even Stokkedalen, RPS Drive 6
• 2008-07-28: Found n = 739321, David Metcalfe, RPS Drive 6
• 2008-07-19: Found n = 618293, Mark Jordan, RPS Drive 6
• 2008-06-28: Found n = 645401, Carlos Eduardo Pinho, RPS Drive 6
• 2008-06-22: Reserved by RPS Drive 6, for n > 600000
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-05-31: Found n = 483153, Larry Soule, RPS Drive 2
• 2006-04-22: Found n = 379649, Larry Soule, RPS Drive 2
• 2006-03-28: Found n = 263093, Larry Soule, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2005-01-12: Checked to n = 210000, Steven Harvey, released
• 2005-01-10: Reserved by Steven Harvey from n=200000
• 2000-03-28: Found n = 47877, Dirk Augustin
• 1999-09-23: Found n = 40429, Tom Kuechler